MADDALENA microCLIMA ULTRA User manual

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Installation and Operating Instructions
Calculator with Ultrasonic Flow Sensor (Heat Meter, Cooling Energy Meter, Combined
Heat/Cooling Energy Meter)
microCLIMA ULTRA/SENSOSTAR®2C_US
Certificate no:
DE-09-MI004-PTB018 (MID heat); 22.72/09.01 (National German cooling)
1Application and Function
Thermal energy meter (heat meter, cooling energy meter or combined heat/cooling meter) designed for the
measurement of the consumed thermal energy in a closed heating or cooling or heating/cooling system.
2Scope of delivery
-Calculator with ultrasonic flow sensor (heat meter, cooling energy meter, combined heat/cooling energy
meter)
-Installation kit: 5 self-lock seals + 5 seal-wires; O-ring ; 2 screws + 2 dowels for direct screw mounting
-2 gaskets for the flow sensor
-Installation and Operating Instructions
3General Information
-Valid standards for the application of heat meters: EN 1434, parts 1 –6; the Measuring Instrument
Directive 2004/22/EC, Annexes I and MI-004; and the relevant national verification regulations.
-For the selection, installation, commissioning, monitoring and maintenance of the instrument observe the
standard EN 1434 part 6 as well as Annex 22 of the verification regulations (for Germany).
-National regulations for the consumption measurement of cooling must be observed.
-The technical regulations for electrical installations are to be observed.
-This product fulfils the requirements of the European Council Directive on Electromagnetic Compatibility
(EMC Directive) 2004/108/EC.
-The identification plate of the instrument and the seals must not be removed or damaged –otherwise the
guarantee and the approved application of the instrument are no longer valid!
-To achieve measurement stability of the meter is it necessary that the water quality meet the requirements
of the AGFW-recommendation FW-510 and the document VDI (Association of German Engineers) VDI 2035.
-The heat meter left the factory in conformance with all applicable safety regulations. All maintenance and
repair work is to be carried out only by qualified and authorized technical personnel.
-The instrument must be stored and transported at temperatures above-freezing.
-Instruments with activated radio function are not allowed on air freight.
-The correct installation point in the system must be chosen: forward or return flow, as stated on the type
identification label.
-The temperature sensor cables and the cable between the calculator and flow sensor must not be kinked,
rolled up, lengthened or shortened.
-To clean the heat meter (only if necessary) use a slightly moist cloth.
-To protect against damage and dirt the meter should only be removed from the packaging directly before
installation.
-If more than one meter is installed in one unit, care must be taken to ensure that all the meters have the
same installation conditions.

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-All specifications and instructions listed on the data sheet and in the Application Notes must be adhered to.
-Further information can be obtained at www.engelmann.de.
-Instruments which have been replaced or exchanged must be disposed of according to relevant
environmental regulations.
-The display is deactivated and can be activated for one minute by pushing the button (except calculator
without additional interfaces).
3.1 Definition of pictograms on type identification label
Installation in return flow
Installation in forward flow
4Mounting of the Flow Sensor
4.1 Safety instructions
-Look out for sharp edges (pipes, flanges).
-Installation and removal should only be carried out by qualified technical personnel.
-Mounting and dismounting may only be carried out without pressure in the heating or cooling system.
-After installation a hydraulic pressure test should be carried out using cold water to check for leaks.
-For safe operation, the instrument must be used only under the stated operating conditions (see section
Technical Data). In addition, the guarantee only applies if the allowed operating conditions have been
adhered to.
-The security seals may not be damaged, otherwise the guarantee is no longer valid.
-Protection against lightning is not guaranteed; lightning protection must be implemented at the installation
site.
4.2 General information on the flow sensor
-Be careful not to pick up the flow sensor on the plastic housing. Always pick up and carry the sensor on the
threaded or flanged connections.
-All cables must be laid at a minimum distance of 20 cm to high-voltage current cables.
-If more than one sensor is being installed in a unit, care must be taken to be sure that all the meters have
the same installation conditions.
-Overpressure must be applied in order to avoid cavitation in the complete measurement range; this means
at least 1 bar up to qpand approx. 3 bar at overload qs(specifications for approx. 80°C).
-The flow sensor left the factory in conformance with all applicable safety regulations. Calibration,
maintenance, repairs and the exchange of parts may only be carried out by qualified technical personnel
who are familiar with the dangers involved. Further technical support can be provided by the manufacturer
upon request. Verification seals on the flow sensor may not be damaged or removed – otherwise the
guarantee and verification of the instrument no longer apply!
4.3 Technical data of the flow sensor
-Environmental class A (EN 1434), for indoor installation
-Mechanical class M1*)
-Electromagnetic class E1*
* as per Measurement Instrument Directive 2004/22/EU
Flow sensor
(refer to the specifications on the sensor)
Installation point
standard
In return flow
optional
In forward flow (only for heat meter),
calculator must be set in factory
Mounting position
heat meter
any

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Nominal flow rate qp
Overall length
Connection
Maximum flow rate qs
Minimum flow rate qi
Response threshold (variable)
Pressure loss at qp
Kv flow rate at Δp 1 bar
Kv flow rate at Δp 100 mbar
Weight
m3/h
mm
G/DN
m3/h
l/h
l/h
mbar
m3/h
m3/h
kg
0.6
110
G 3/4
1.2
6
2.4
150
1.5
0.5
1
190
G 1
1.5
DN20
3
1.5
110
G 3/4
3
15
6
150
3.9
1.2
1
130
G 1
160
3.8
1.5
190
DN20
3
2.5
130
G 1
5
25
10
200
5.6
1.8
1.5
190
220
5.3
1.7
DN20
3
3.5
260
G 1 1/4
7
35
14
60
14
4.5
3
DN25
5
6
150
G 1 1/4
12
60
24
240
12
3.9
3
260
12
60
24
180
14
4.5
3
DN25
5
10
200
G 2
20
100
40
130
28
8.8
2.6
300
110
30
9.5
4
Mounting position
Cooling meter
See section 5 Installation for Cooling Applications
Straight pipe sections
None required
Accuracy class
1:100 or 1:50
Maximum overload
2.8 x qp
Nominal pressure
PN 16, PN 25
Protection class flow sensor
IP54
For heat meter
IP65
For cooling meter (optional for heat meter)
Max. medium temperature
150°C for 2000 h
Temperature range (medium)
5°C to 130°C *
Recommended for heat
10°C to 130°C **
Recommended for cooling
5°C to 50°C
* National approvals may vary
** Short model 150 mm only from 20°C to 130°C
Storage temperature
-20°C to 60°C
Ambient temperature
5°C to 55°C
Ambient humidity
< 93% relative humidity

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Nominal flow rate qp
Overall length
Connection
Maximum flow rate qs
Minimum flow rate qi
Response threshold (variable)
Pressure loss at qp
Kv flow rate at Δp 1 bar
Kv flow rate at Δp 100 mbar
Weight
DN40
130
28
8.8
7
15
200
DN50
30
150
60
95
49
15.4
5
270
110
45
14.3
8
25
300
DN65
50
250
100
105
77
24.4
11
40
300
DN80
80
400
160
160
100
31.6
13
60
360
DN100
120
600
240
115
177
56.0
22
4.4 Dimensions
Threaded connection Flange connection
4.5 Integration in the Heating System
Please inspect and check all dimensions to be sure that there is
sufficient space in the intended location for installation of the
flow sensor.
Flush the system thoroughly before installing the flow sensor.
No minimum straight pipe sections are required upstream or
downstream for the flow sensor.
qp
m³/h
PN
bar
DN
L
h
Øc
Ød
Øe
no.
holes
3.5
25
25
260
51
115
85
14
4
6
25
25
260
51
115
85
14
4
10
25
40
300
48
150
110
18
4
15
25
50
270
46
165
125
18
4
25
25
65
300
52
185
145
18
8
40
25
80
300
56
200
160
18
8
60
16
100
360
68
235
180
18
8
60
25
100
360
68
235
190
22
8
qp
m³/h
PN bar
L
[mm]
h
[mm]
AG
3.5
16
260
51
G 1¼ B
6
16
260
51
G 1¼ B
6
16
150
22
G 1¼ B
10
16
200
48
G 2 B
10
16
300
48
G2B

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Black housing of transducers
If the flow sensor is being installed in the common return flow of two heat systems, e.g. heating and hot water, the
mounting location must be sufficiently separated from the T-piece, that is, at least 10 x DN from the T-piece, so
that the different water temperatures are well-mixed before reaching the sensor.
Following the instructions in the illustrations below, mount the flow sensor horizontally or vertically between two
close-off valves, making sure the arrow on the sensor corresponds to the actual direction of flow.
Mounting considerations
Connection pieces are to be sealed against manipulation.
5Installation for Cooling Applications
When mounting the flow sensor for cooling applications make
sure that the transducers (black housing) are to the side of, or
under, the measuring tube (to prevent accumulation of
condensation water). The flow sensor must always be mounted
in the return flow. The calculator should be mounted on the wall,
for example.
Attention must be paid that the cables connected to the calcu-
lator are laid such that condensation water cannot run along
them and into the calculator. Cable loops should hang under-
neath.
6Starting Up
-Open close-off valves. Check the heating system for leaks and vent thoroughly. After 100 seconds at the
latest the flow sensor will begin to operate.
-When the response threshold has been exceeded and the flow is positive, volume pulses will be generated
as determined by the instrument parameterization.
-Check the measured flow values on the connected calculator for plausibility.
-Vent the system until the flow display on the connected calculator is stable.
-Then affix the user seals on the connections.
6.1 Important Notes
Regulations for the application of meters are to be observed, see Standard EN 1434, part 6! In particular, cavitation
must be avoided.
When installing the flow sensor, make sure to protect against overflow and dripping water
Avoid air pockets
Install any valves or controllers downstream from the
flow sensor
Mounting positions for cooling applications

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All technical data specified in the flow sensor data sheet and instructions must be adhered to.
The instrument identification and the seals required for verification of the flow sensor must not be damaged or
removed –otherwise the guarantee and verification of the instrument no longer apply!
Transport of the flow sensor is only permissible in the original packaging.
7Mounting of the Components
7.1 Mounting of the calculator
The housing cover can be opened by pulling the two snap-fit hooks at the base of the calculator (between the cable
glands) towards you.
Before mounting, check to make sure that the cable lengths of the instruments to be connected are correct for the
individual installation situation.
For existing mounting positions an optional adapter panel - meeting EN 1434-2:2007 (D) specifications –is available
which makes it possible for the wall-mounting support to be mounted using standardized drill holes. The centre to
centre drill hole separation for the wall-mounting unit and direct screw mounting is 119 mm.
With wall-mounting support
Direct screw mounting
With commonly available
mounting rail
Attention
After the temperature sensors and flow meter have been connected the calculator must be sealed against
manipulation. Please apply the enclosed self-lock seals and the seal- wires at the holes provided on the housing
cover.
8Connection of the components
8.1 Connection of the temperature sensors
Important
First mount the temperature sensors and then start running of the flow meter. This way unnecessary error
messages can be avoided.
-Loosen two cable glands and glide them over the sensor cables. Remove the two blind plugs from the cable
gland openings.
-Feed the temperature sensor cables through the appropriate openings of the cable glands into the terminal
box.
-Clamp the wires as shown in the illustrations:

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Connection 2-wire-system
Connection 4-wire-system
Cables that are too long should not be rolled up tightly into an ‘air-core coil’. The cables should either be laid out
disordered, or rolled up loosely into a wide coil which can be turned and tied into an ‘8’.
At delivery, the display shows ‘ERR 03’ until temperature sensors have been attached. This message disappears as
soon as temperature sensors have been connected and the first measurement is carried out (every 30 seconds with
flow, 10 minutes without flow).
Recognition of switched temperature sensors is only activated for meters which are purely heat meters or cooling
meters. Recognition of switched sensors is not possible for dual-purpose heat/cooling meters.
The calculator connections have been designed to meet the valid standard EN 1434-2. All terminal strips have been
labelled according to this standard.
The terminal strips are located under the cover of the calculator housing.
9Start of Operation
-Slowly open the shut-off valves.
-Check that there are no leaks.
Check the following points:
-Are all the shut-off valves open?
-Is the meter of the right size?
-Is the heating (heating/cooling) system clear (dirt filters not clogged)?
-Does the directional arrow on the flow sensor match the actual direction of flow?
-Is a flow volume displayed?
-Is a plausible temperature difference displayed?
When the meter is functioning properly, attach the seals to the calculator, the temperature sensors and the flow
sensor (required to protect against manipulation).
10 Display
The calculator has a liquid crystal display with 8 digits and special characters. The values that can be shown are
divided into three display loops. All data is retrieved using the push button next to the display.
At the start you are automatically in the main loop (1st level). By pressing the push-button longer than
4 seconds you change to the next display loop. Keep the push-button pressed until you reach the desired
information loop. By pressing the push-button briefly you can scan all the information within a loop.After 1 minute
of non-use of the push-button, the display automatically returns to the main loop.

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Level 1/Main loop
1) Standard display: total
heat energy; alternating
display: cooling energy
(for heating/cooling
meter)
2) Segment test, all
segments triggered
simultaneously
3) Heat energy at last
reading date alternating
with last reading date1
4) Total flow volume in m³
5) Current power in kW
6) Current flow in m³/h
7) Current date
8) Information message
(alternating binary and
hexadecimal display)
9) Selectable customer-set
calculator no. (secondary
address); factory setting is
the serial number
10) Tariff register 1: Value
alternating with tariff
register no. and criteria2
11) Tariff register 2:
Values alternating with
tariff register no. and
criteria2
12) Momentary reading of
the pulse counter 1
alternating with the pulse
value2
13) Momentary reading of
the pulse counter 2
alternating with the pulse
value2
Level 2/Technician’s loop
1) Current forward flow
temperature in °C
2) Current return flow
temperature in °C
3) Temperature
difference
4) Days since first
verification of calculator
5) Pulse value of calculator
6) M-Bus address (primary
address)
7) Serial number
8) Software/firmware
version
10) Set billing date

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9) Return flow or forward
flow temperature sensor
type and mounting
position
11), 13), 15) Maximum
power value alternating
with date and time of
occurrence
12), 14), 16) Maximum
flow value alternating with
date and time of
occurrence
Level 3/Statistics Loop
1) Previous reading date alternating with its value.
Alternatively, the total volume or tariff values can be
displayed1.
2-16) Monthly values: Dates alternating with their
values. Alternatively, the total volume or tariff values
can be displayed1.
1Up to the end of the month the consumption and reading date for that month will be shown as 0.
2It can be set using the software “Device Monitor”. A dedicated meter password is necessary. The password is available from
the manufacturer.
11 Technical Data
Calculator
Ambient temperature
°C
5 to 55
Temperature range
°C
1 to 150 (1 to 180)
Temperature difference heat
K
3 to 100 (3 to 130 for temperature range 1 to 180 °C)
Temperature difference cooling
K
-3 to - 50
Calculation of heat from
K
∆Θ> 0.05
Calculation of cooling from
K
∆Θ< -0.05
Dual-purpose heat/cooling meter
K
∆Θ HC< -0.5
Resolution temperature
°C
0,01
Measurement cycle
sec
30; (4 with external power supply)
Power supply
V
3.6 lithium battery (standard version);
3 (external power supply)
Battery lifetime, estimated
years
Standard: 10 years; 6 years + 1 with pulse output: see
“Influencing_factors_battery_lifetime”.
Display
LCD 8 digits + special characters
Units
MWh (standard);
kWh; GJ (optional)
12 Optical (infrared) interface
For the communication with the optical interface an optocoupler and the Device Monitor is necessary. The
optocoupler and the‚ Device Monitor’ software are available as accessory equipment.
Baud rate: 2400 baud
The optical infrared interface is activated by pressing the push-button.
If within 60 seconds neither a valid telegram is received nor the push-button pressed again, the interface is
deactivated. The number of read-outs via the optical interface is limited to 300 times per day.

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13 Additional Interfaces and Power Supply
13.1 Connection of additional interfaces and power supply
The following are options that the calculator can be equipped with at the factory (state when ordering) and will
vary depending on the individual calculator.
-Feed the cable to be connected (cable diameter 3.5 to 6.5 mm) through an opening on the bottom edge of
the calculator housing into the space containing the terminal strips.
-Loosen a cable gland and glide it over the cable (cable diameter 3.5 to 6.5 mm). Remove the blind plug in
the cable gland opening.
-Feed the cable of the through the opening into the terminal box.
-The terminal clamps are designed to fit strands with ends with a cross-section of 0.5 –1.5 mm2.
-Clamp on the cable according to the following illustrations that apply depending on the interface.
Connection of M-Bus
Connection of pulse
outputs or inputs
Connection of pulse
outputs heat/cooling
Connection of power
pack
Polarity is not important
for these connections so
the wires can be clamped
arbitrarily.
Depending on the option,
there are two additional
pulse inputs
(IN 2 and IN 3) for further
meters or two pulse
outputs (OUT 1 and OUT
2) for connection to an
additional system. For
connection of meters with
open collectors attention
must be paid to the
polarity.
For the dual-purpose
heat/cooling meter
version, separate pulse
outputs for heating
energy (OUT 1) and
cooling energy (OUT 2)
are available.
It is strongly
recommended to use only
the manufacturer`s
original power pack.
It is imperative to pay
attention to the polarity.
-Check that the connections are tight.
-Screw the cable glands tight by hand.
13.2 M-Bus (optional)
The M-Bus is a galvanically isolated interface for the transmission of meter data (absolute values).

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13.2.1 General information about the M-Bus interface
It is important to note that the acknowledged state of the art technology rules and the relevant legal restraints
(international and local; see 13.2.2 “Relevant norms, standards and literature on the M-Bus”) are to be observed.
The installation has to be performed by authorized, skilled persons.
If the regulations and the information in the installation and operating instruction manuals are not strictly followed,
or if the installation is shown to be faulty, any resulting expenses will be charged to the company responsible for
the installation.
Recommended type of cable: Telephone cable J-Y(ST)Y 2x2x0.8mm².
It is important to make sure that the topology of the M-Bus network (cable lengths and cross-sections) is suitable
for the baud rate (2400 Bd) of the end instruments.
Further information can be found in the detailed ‘Application Note M-Bus’ at www.engelmann.de.
13.2.2 Relevant norms, standards and literature on the M-Bus
IEC 60364-4-41 (2005-12)
Low-voltage electrical installations - Part 4-41: Protection for safety -
Protection against electric shock
IEC 60364-4-44 (2007-08)
Low-voltage electrical installations - Part 4-44: Protection for safety -
Protection against voltage disturbances and electromagnetic disturbances
IEC 60364-5-51 (2005-04)
Electrical installations of buildings - Part 5-51: Selection and erection of
electrical equipment - Common rules
IEC 60364-5-54 (2011-03)
Low-voltage electrical installations - Part 5-54: Selection and erection of
electrical equipment - Earthing arrangements and protective conductors
EN 50310 (2010)
Application of equipotential bonding and earthing in buildings with
information technology equipment
EN 13757-1:2002, 2:2004, 3:2004
Communication systems for meters and remote reading of meters
The M-Bus
A Documentation, Version 4.8, M-Bus User group
TI Technical Journal
Texas Instruments Technical Journal Vol. 8, 1991 M-Bus
13.2.3 Additional technical specifications
The installation has to fulfil the requirements of the relevant norms, standards and literature (see paragraph
13.2.2) and the specifications as follows:
Maximum voltage M-Bus
42 V
Minimum voltage M-Bus
21 V
Maximum ripple voltage
200 mV; EN 13757-2:2004; 4.3.3.6
Maximum voltage potential
differences
2 V
13.2.4 Technical data M-Bus
Primary address
0 (factory setting); 1 –250 (configurable)
Baud rate
2400; 300 (auto speed detect)
13.2.5 Number of read-outs
The number of possible read-outs depends on the number of instruments in the M-Bus network
Number of instruments in
network
Read-outs per day primary
address
Read-outs per day secondary
address (without using SND NKE)
3
655
275
20
485
170
60
300
90
120
190
52
250
105
27
Table is only valid for Baud rate 2400!

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If fewer read-outs are carried out, the unused ‚credit’ is stored in the instrument and can be used later.
During M-Bus communication with the calculator the other interfaces (push-button, optical interface) of the device
cannot be used.
13.2.6 M-Bus addresses
Calculators with the M-Bus option can be addressed primarily or secondarily.
Both addresses can be set via the optical interface using the Device Monitor or via the M-Bus interface.
The factory setting of the ID-No. (secondary address) is identical to the serial no.
13.3 Radio interface wireless M-Bus EN 13757-3, EN 13757-4 (optional)
The radio interface is for the transmission of meter data (absolute values).
General information about the radio interface
Installation of radio components between or behind heating pipes, or the presence of other bulky obstacles directly
over or in front of the housing must be avoided.
The transmission quality (range, telegram processing) of radio components can be negatively influenced by
instruments or equipment with electromagnetic emissions, such as telephones (particularly LTE mobile radio
standard), Wi-Fi routers, baby monitors, remote control units, electric motors, etc.
In addition, the construction of the building has a strong influence on the transmission range and coverage.
Furthermore, when using installation boxes (substations) they must be equipped with non-metallic covers or doors.
The factory-setting of the meters clock is standard (winter) Central European Time (GMT +1). There is no automatic
changeover to daylight savings (summer) time.
The radio function is deactivated upon delivery (factory-setting). See section 0 “*Factory settings may vary from the
above.
Activation of the radio interface”.
13.3.1 Technical data radio
Frequency
868 MHz
Transmission power
up to 12 dBm
Protocol
wireless M-Bus based on EN 13757-3
Selectable modes
S1/T1/C1
Telegrams
-Short telegram conform to AMR (OMS-Spec_Vol2_Primary_v301): energy
(heat/cooling energy, pulse input 1, pulse input 2), total volume, flow, power,
information message, return flow temperature, temperature difference
-Long telegram for walk-by read-out: energy (heat/cooling energy, pulse input 1,
pulse input 2), total volume, information message, 15 monthly values
Encryption
AES: Advanced Encryption Standard; key length: 128 bits
13.3.2 Radio configuration*
Parameter
Possible settings
Factory setting
Mode
S1/T1/C1; unidirectional
T1 (unidirectional)
Transmission period
00:00 - 24:00; any time period in the day
7:00 am - 7:00 pm
Transmission interval
120 seconds - 240 minutes
120 seconds (heat meters)
Weekdays
Monday –Sunday (any weekday)
Monday - Friday
Weeks in a month
1 –4 (4: uninterrupted, incl. a possible 5th week)
1 –4 (4: uninterrupted)
Months
1 - 12
1 - 12
Radio activation date
01.01 - 31.12. (day. Month)
not set
AES-128- Encryption
-Not encrypted;
-Encrypted:
-Master Key
Master Key; not activated

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-random key per instrument
Type of telegram
-Short telegram in conformity to AMR (OMS-
Spec_Vol2_Primary_v301)
-Long telegram for walk-by read-out
Short telegram (AMR)
*Factory settings may vary from the above.
13.3.3 Activation of the radio interface
The radio interface leaves the factory deactivated. It can be activated as follows:
a) Without using additional software the radio function can be activated by pressing the
push-button for over 3 seconds while the display is showing the item ‘M-Bus
address’, (see section 10 “Display”Level 2/Technician’s Loop). The standard factory-settings will be
activated.
b) The radio function can also be activated using the software ’Device Monitor’. This software can be ordered
separately as an option. The exact procedure for activating the radio function using this software is
described in the accompanying handbook.
After successful activation of the radio function a black triangle will appear permanently in the lower left corner of
the display.
If using the compact mode, for one hour after activation the meter will transmit in installation mode. This means
that format telegrams and compact telegrams will be send alternately. During installation mode at least one meter
of the version being installed (forward or return flow, heat or cooling or heat/cooling, pulse inputs, display units)
must be received by the Engelmann Read-out Software. The format of the telegram will be stored locally in the PC
in an .xml file. After completion of the installation mode only compact telegrams will be transmitted.
13.4 Two additional pulse inputs (optional; only in conjunction with M-Bus or radio)
With this option, additional instruments with pulse outputs can be read out via M-Bus or radio.
General information about pulse inputs:
It is important to note that the acknowledged state of the art technology rules and the relevant legal restraints
(international and local; see 13.4.1 “Relevant norms, standards and literature on the pulse inputs”) are to be
observed.
The installation has to be performed by authorized, skilled persons.
If the regulations and the information in the installation and operating instruction manuals are not strictly followed,
or if the installation is shown to be faulty, any resulting expenses will be charged to the company responsible for
the installation.
13.4.1 Relevant norms, standards and literature on the pulse inputs
IEC 60364-4-41 (2005-12)
Low-voltage electrical installations - Part 4-41: Protection for safety - Protection
against electric shock
IEC 60364-4-44 (2007-08)
Low-voltage electrical installations - Part 4-44: Protection for safety - Protection
against voltage disturbances and electromagnetic disturbances
IEC 60364-5-51 (2005-04)
Electrical installations of buildings - Part 5-51: Selection and erection of
electrical equipment - Common rules
IEC 60364-5-54 (2011-03)
Low-voltage electrical installations - Part 5-54: Selection and erection of
electrical equipment - Earthing arrangements and protective conductors
EN 50310 (2010)
Application of equipotential bonding and earthing in buildings with information
technology equipment
EN 1434-2 2007
Heat Meters —Part 2: Constructional requirements

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13.4.2 Technical data pulse inputs
Pulse input class
CMOS; IB according to EN 1434-2:2007
Internal pull-up voltage
+ 3 V DC
Internal pull-up resistance
2 MΩ
Current
= 1.5 µA
High-level threshold
U ≥ 2 V
Low-level threshold
U ≤ 0.5 V
13.4.3 Electrical requirements on the pulse output of the instrument to be connected (e.g. flow meter)
Pulse output class
(passive) output OA (reed contact/electronic switch) or OC (open collector)
according to EN 1434-2:2007
Pulse length "on"
≥ 100 ms ≤ 150 ms (for electronic switches)
Pulse length "off"
≥ 100 ms
Current
= 1.5 µA
Resistance "contact open"
≥ 6 MΩ
Resistance "contact closed"
≤ 3 kΩ
13.4.4 Setting up the two additional pulse inputs
The optional pulse inputs 1 + 2 for external meters can be set up using the Device Monitor configuration software.
The input pulse value, the units and the starting values of the external meters can be configured.
13.4.5 Set-up possibilities
Pulse value
Units
1
litres/kWh/pulse without unit
2.5
litres/kWh/pulse without unit
10
litres/kWh/pulse without unit
25
litres/kWh/pulse without unit
100
litres/kWh/pulse without unit
250
litres/kWh/pulse without unit
1000
litres/kWh/pulse without unit
Installation notes for pulse inputs
It is important that the pulse cables are not be affected by (or exposed to) the M-Bus voltage!
Check the polarity of pulse generators with ‘open collector’ outputs.
The cable wires must not touch each other during installation; otherwise pulses will be counted in the instrument.
When setting up the meter it may be necessary to adjust the meter reading of the instruments connected and the
pulse value using the Device Monitor software.
13.5 Potential-free pulse output (optional)
The potential-free pulse output is an electronic switch which outputs pulses that can be used for any purpose.
The pulse output contact closes, corresponding to the pulse value defined by the resolution of the displayed value
(see next passage).
13.5.1 Pulse output for energy (OUT1-Energy)
One pulse is generated by the pulse output for energy when the last digit of the energy display is increased by one.
The pulse value is automatically determined by the last digit of the energy display.
The pulse units are identical to the units of the energy display:
Example 1: Display 12345678 kWh => pulse value for energy pulse output = 1 kWh/pulse
Example 2: Display 12345,678 MWh => pulse value for energy pulse output = 0,001 MWh/pulse (1
kWh/pulse)

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Example 3: Display 1234567,8 GJ => pulse value for energy pulse output = 0,1 GJ/pulse
13.5.2 Pulse output for volume (OUT2-Volume)
One pulse is generated by the pulse output for volume when the second-to-last digit of the volume display is
increased by one.
The pulse value is automatically determined by the second-to-last digit of the volume display. The pulse units are
identical to the units of the volume display.
Example 1: Display 12345,678 m3=> pulse value for volume pulse output = 0,01 m3/pulse
Example 2: Display 12345678 l => pulse value for volume pulse output = 10 l/pulse
13.5.3 Pulse outputs for calculator with combined heat/cooling measurement
For this type of calculator the outputs OUT1 and OUT2 are both outputs for energy.
The behaviour is the same as described in chapter 13.5.1.
OUT1 is the output for the pulses for heat energy.
OUT2 is the output for the pulses for cooling energy.
13.5.4 Technical data pulse output
Pulse output class
OA (electronic switch) according to EN 1434-2:2007
Pulse values
See chapter 13.5.1 to 13.5.3
Peak switching current
300 mA ~/-
Switching voltage, maximum
35 V ~/-
Switching power, maximum
300 mW
Contact isolation
> 109Ohm
Contact resistance (on)
max. 25 Ohm
Contact capacity
1.5 pF
Maximum current
120 mA
Withstand voltage (open contact)
350 V ~/-
Closing time
125 ms
Min. close-open-time
125 ms
14 Information Messages
When the instrument has detected an information message, the message symbol is displayed:
The specific message can be found at the menu item 8 ‘Information message’ in Level 1/Main loop (see section 10
“Display”).
The instrument recognizes seven message causes, which can also occur in combination with each other. The
messages are shown on the display. The message code is displayed alternately in binary and hexadecimal form.
Binary display
Description
Hexadecimal display
1 at first place
Checksum fault
H 40
1 at second place
E2PROM defective
H 20
1 at third place
Reset
H 10
1 at fourth place
Temperature difference
H 08
1 at fifth place
Internal calibration defective
H 04
1 at sixth place
Return flow sensor defective
H 02
1 at seventh place
Forward flow sensor defective
H 01

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Example: Temperature sensor switched
Message
Checksum fault
E²PROM fault
Reset
Temperature difference
Internal calibration error
Return flow sensor fault
Forward flow sensor fault
Alternating hexadecimal
message displayed (LCD)
Bit
6
5
4
3
2
1
0
Display location
1
2
3
4
5
6
7
Alternating binary
message displayed (LCD)
When a message sign appears in the standard display (total heat, total cooling or alternating total heat and cooling
energy), with the exception of the messages ’reset’ (10), (01), (02), (03), (08) and (18), the instrument must be
exchanged and sent to the supplier for examination.
14.1 Message description
Message
Effect
Possible cause
Ff-sensor fault
No calculations are carried out. The
registers for flow and energy are
not being updated (no new data is
being stored).
Sensor cable severed; sensor cable
shorted circuited.
Rf-sensor fault
No calculations are carried out. The
registers for flow and energy are
not being updated (no new data is
being stored).
Sensor cable severed; sensor cable
shorted circuited.
Internal calibration error
There is no energy calculation. The
registers for flow and energy are
not being updated (no new data is
being stored).
Defective component.
Temperature difference wrong
(Only for heat or cooling meter)
There is no energy calculation.
Heat measurement needs positive
temperature difference. Cooling
measurement needs negative
temperature difference
-Temperature sensors switched
-If the pump system is not active
the temperature difference
might be inverted.
Reset
The measurements since the last
storage of data in the E2PROM are
lost (maximum one day).
-EMI (electromagnetic
interferences)
-Low battery
E2PROM fault
After a reset, the instrument is
without function.
Defective component.
Checksum fault
No calculations are carried out. The
registers of flow and energy are not
being updated.
Defective component.

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15 MID Declaration of Conformity
For the product described in this document we confirm, as the manufacturer, that it meets the fundamental
requirements of the following directives:
-Directive 2004/22/EC of 31 March 2004 on measuring instruments, in particular those in Annex MI-004
-Directive 2004/108/EC on EMC
-Directive 2006/95/EC on low voltage
-Directive 1999/5/EC (R&TTE)
The complete signed declaration can be found at www.engelmann.de.
16 Manufacturer
Engelmann Sensor GmbH
Rudolf-Diesel-Str. 24-28
69168 Wiesloch-Baiertal
Germany
Tel: [phone]
Fax: [phone]
E-Mail: [email protected]
www.engelmann.de
17 Contact
Maddalena S.p.A.
Via G.B. Maddalena, 2/4
33040 Povoletto (UD) –Italy
Tel.: [phone]
Fax.: [phone]
www.maddalena.it
Subject to technical change.